Harrow



July 10, 1945. J. v. DYRR 2,380,298

HARROW Filed Au 10, 1942 2 Sheets-Sheet 1 Jac'a 1397?:

July 10, 1945.

J.V.DYRR

HARROW 2 Sheets-She t 2 Filed Aug; 10, 1942 Jazz-57, Jaca 2:0

Patented July 10, 1945 v is) Ihis invention relates to a; tandem harrow.More specifically it relates-to a means for permitting' the turn of a'tandem bar-row:

' Ina ta'ndem' harrow composedof a pairof front gangs and a pair of reargangs, tu'rnis'facilitatedv :by a pivotal connection between thefront'and prearsframes. to which the frontand-rear gangs .Varevrespectively connected. There is no great difficulty .in turninggsuch'a:harrow on level ground,1-but on ground having side slope thereis:consid'er'able tendency for the rear pair ofgangs not to follow thefront gangs in'the turn but to JacoliVI'Dyrr, 'Beilfcann 5s tio'ila'lHarvester Company 1f?Appncaiomugta 10,19 ,r.S'erial No.A ;454;2ll2' splainis. (0155 33); Q

shown L but coincident with "the axis :of pins 19. The pins 1 9 form thpivot connections between "-thet inner ends': of brace and a1 U-shaped"member- 2i pivotallyconnectedto the inner ends of the front gangs In onthe axis of the pins [9.

''The braces-20 extend from the u-shaped member "2| outwardlyanddownwardly'to pins 22, only one .slide. .d0WI1-hll1.".. The presentinvention has to i do with a construction which will overcome thistendency. t H v, V

object of the present :invention is to proyide animprovedtandem harrow.-v i Another object is the provision ofan improved connection between thegangs-of a tandem nar- .row, which will. facilitate turning 'th harrowjA further object is to provide a looking or holdingmeans employable. forthe backin'g' of a harrow, the parts of iwhich are connected for easyturning.

According to thespresent invention, the front' and rear draft framesassociated respectively with the front and rear gangs of a tandemha'rrow are connected with one another in a pin fandslot connection andby means of 'fiexible ele- --rnents at oppositesides'of the pin-and-slotcontne io H In thedrawingsr, '1

Figure 1 is a plan view of the'harrow' of the present invention inworking position;

'7 Figure 2 is a side view of the narrow in transa pair of front gangsH1 and a pair of rearzgangs l I oppositely angled in working position;as shown in Figure 1. A-front frame I2 is connected to the vfront gangsland; this front'frame comprises {essentially a central longitudinal,member 13 having a forward portion M at one level and j a rearwardportion l5 at a somewhat higher level 'above the gangs ID as indicatedin Figure 2 The portions l4 and I5. are connected by;an inter- :mediatebent portion 6. Secured to the forward portion I4 is a shorttransversepiece'l1,

ends of which are connected short links .18

,. 9 ding 131 theinner end-sci, the front gan s {Jig spa-a 9. 9nnects1d;the ewi m tp ts w of which is shown, wh-ich connect the braces to theouter 'ends'of' the front gangs l0. These braces form no partof thepresent invention. Sli'dably-mounted upon the forward portion of thefront frame 1215- a draft head 23 having an attaching portion 24 atthei'forward end therewith any of the teeth 25cm the slidable drafthead1,.23. In thislway the latch '26 determines the lposition of thedraftvhead' 23 with respect to the front frame 12.. ,Long links 28 areconnected to the, outer ends'of the front gangs as at 29 and I;totheslidable draft :head 23Iat 30. I

c .Agre'ar draft .-frame'"3l for the rear frames II is composedyof aplate :32"; and a central longi- As seen in Figure2, the centralmember33 has a rear por .tion 34 at a relatively low level, :a forward portion35=at a relativelyv high level, and aniextreme front end 36 at a levelsomewhat between those tud-inal member 33 secured thereto.

of the portions 534' and 35m Connecting th porti0ns34 and'36,respectively, to the portion 35 braces 41 The braces. are similar to thebraces 20 associated, with the. front gangs 'Ill and extendoutwardly anddownwardly to pins or bolts 42, only one vof'which is showmwhich connectthe braces 4| and; theouter ends of the rear gangs -;l I. -As in-thecaseof the braces 20 for-the front gangs It]; the braces 4| form no partofjthe present invention, They serve merely to keep the gangs relativelylevel-,1 Long'links 43 are con- .nected -neartheouter ends of the reargan s H asindicated at 44 and to rearward projections 45 onthe rear sideof the inner ends of the front gangs I. As seen in Figure 3, the extremeforward end 36eon the central member 33 of-the rear frame 3| carries abolt 46 andnut-fl, the bolt When the harrow is to be transported, the

I gangs must be straightened so that the front gangs are in line withone another and are parallel with the rear gangs. When this is to bedone, the latching element 54 is released from the pin 53 so that theholding member 49 is brought into the position shown in Figure 3, inwhich it v substantially prevents sliding movement of the which extendsacross and in contact with a pin I 53 extending between the sides of theU-shaped member 21. The lower side of the control and latch member 52carries an element 54, which is adapted to engage the pin 53 and therebyto hold the holding and latch member 49in the raised position of Figure2. This is accomplished by pull upon the cord 55 attached to the forwardend of the control member 52. When the hold ing. member 49 is in theraised position of Figure 2,.the bolt 46. may slide in the slot 48, andthus the rear frame 3| may have both a sliding anda pivoting movementwith respect to the front frame l2.

For operation of the harrow on level ground, simple pivotal connectionbetween the draft frames associated with the front and rear gangs of theharrow would be sufficient, for it would not be difficult to make therear gangs. ll'properly follow behind the front gangs 10. However, whenthe harrow is operated upon ground having a side slope, the rear gangsmay slide down-hill,

and thus the gangs must be connected in other ways. As seen in Figure 1,there. is secured near but somewhat spaced from the rear end of the rearportion l5 of the front frame [2 a transverse member 56 having openings51 therein. A similar transverse member 58 having openings 59 therein issecured to the forward portion 35 of the. central longitudinal member33. of the rear draft frame. The transverse member 58 is braced bydiagonal. pieces 6.6a. A pair of chains 6.! extends between thetransverse members 56 and 55 at opposite sides of the bolt or pin 46 andthe slot 48 and is connected at its. ends 'in'the openings 5'! and 59 inthe transverse members. When the harrow is operatedv upon ground with aside slope,

the normal tendencyfor the rear gangs not to follow properly behind.the. front gangs but to slide down-hill is resisted b the chains 60 andthe transverse members 56 and 58. For example, when the down-hill is tothe left, then the chain to the. right stays taut and resists thetendency of the rear gangs to slide down-hill and compels them to bedragged directly behind the front gangs. If down-hill is to the right,then the chain 60 at the left stays taut and resists the tendency of therear gangs to slide down-hilla The connection of. the front andrearframes by means i the chain 69 may be moved inwardly to the i'nnermost sets of holes 5.! and 59 so as to- Ice-virtually without effectupon turning. If the harrow is operated upon ground of an excessivesideslope, the chains: 69 are moved; to the. outermost sets of holes; 51and 59.

. links 28.

rear draft frame with respect to the front frame. Then the latch 26isreleased from engagement with the teeth 25 on the sliding draft head23, and the harrow is backed by an application of rearward force to thesliding draft head until the gangs are straightened. The rearward slideof the draft head 23' on the front frame l2 causes a rearward movementof the outer ends of the front frame lfl'through the action of the longThe'rearward projections 45 on the inner ends of the front gangs andthe'long links 43 connected near the outer ends of the rear gangs llcauses a rearward movement of the outer ends of the front gangs ID toeffect a forward movementof the outer ends of the rear gangs ll. Whenthis happens the holding member 49, positioned as shown in Figure 3,prevents any forward movement of the rear draft frame 3| and thusstraightening of the rear gangs is' accomplished. The chains 60 preventduring backing of the harrow any tendency of therear gangs to move toone side of the front gangs.

From. the foregoing description it will be seen that a new and noveltandemharrow construction has been provided. This novel constructioninvolvesmeans which facilitates operation of the harrow upon groundhaving a side slope. The front and rear frames of the harrowhave asliding and pivoting connection, and there are flexible elementsprovided on opposite sides of the sliding and pivoting connection whichcounteralclts the tendency of the rear gangs to run downa i l.

The intention is to limit the invention only within the scope of theappended claims.

What is claimed is:

1. In a tandem harrow comprising a pair of front; gangs, a pair of reargangs, a front draft frame connected to the front gangs, and a reardraftrframe connected to the rear gangs, the combination therewith ofmeans connecting the draft frames in. a longitudinal slide and verticalpivot connection providing relative fore-and-aft movement and relativepivoting between the frames, and fiexiblelaterally spaced draft elementsconnecting the frames on opposite sides of and. spaced from theslide-and-pivot connection whereby draft on the sliding and pivotingconnection and tension in one of the flexible draft elements resistslateral movement of the rear draft frame." during straight-aheadmovement of the harrow and whereby the sliding-connection per- -m-its:angular movement of the rear frame relative to the front frame forturning movement of the narrow.

2.v In a'tandem harrow comprising a pair of front gangs, a' pair of reargangs, a front draft pin whereby draft on the sliding and pivotinconnection and tension in one of the flexible draft elements resistslateral movement of the rear draft frame during straight-ahead movementof the harrow and whereby the slidin connection permits angular movementof the rear frame rela tive to the front frame for the harrow.

3. In a tandem harrow comprising apair of front gangs, a pair of rear'gangs, a front draft frame connected to the front gangs, and a reardraft frame connected to the rear gangs, the

combination therewith of a portion ofthe front draft frame formed with alongitudinal slot therein, a pin secured to the rear draftframe andsliding in the slot, the'pin and slot providing relative fore-and-aftmovement and relative pivoting between the frames, and flexiblelaterally spaced-draft elements connecting the frames on opposite sidesof and spaced from the slot and pin whereby draft on the slidin andpivoting connection and tension in one of the flexible draft elementsresists lateral movement of the rear draft frame during straight-aheadmovement of the harrow and whereby the sliding connection permitsangular movement of the'rear frame rel- I ative to the front frame forturning movement of-the harrow.

4. In a tandem-harrow comprising a pairof front gangs, a pair of reargangs, a front draft frame connected tothefrontgangs, and a rear draftframe connected tothe rear gangs, the combination therewith of a portionof one draft frame formed with a longitudinal slot therein, a

pin secured to the other draft frame and sliding turning movement of Islide-and-pivot connection for adjustment of the harrow gangs bybacking, and flexible elements connecting the frames on oppositev sidesof the 'slide-and-pivot connection.-

.6. A tandem harrow comprising a front frame,

a pair of front gangs adjustably connected therep to, a rear frame, apair of rear gangs connected thereto, the frames including centrallongitudinal jmembers, the one frame havin an elongated slot,

the other frame having a pin fitting into the slot for a sliding andpivoting connection of the frames, a latch member cooperating with thelongitudinal members to prevent sliding between the frames, and flexibleelements connecting the front and rear frames at opposite sides of theslot a d pin.

7. A tandem harrow comprising a front frame, a pair of front gangsadjustably connected thereto, a rear frame, a pair of rear gangsadjustably connected thereto, the frames including central longitudinalmembers, the one frame having an T elongated slot, the other framehaving a pin fitting into the slot for a sliding and pivoting conin theslot, transverse members secured to the front and rear draft frames andhaving attaching portions at spaced points thereon, and flexiblelaterally spaced draft elements extending between the transverse membersat opposite sides of and spaced from the slot and pin and connectnectionof the frames, a latch member cooperating with the longitudinal membersto prevent 5 sliding between the frames, transverse members secured tothe longitudinal members, and flexible elements connectingthe'transverse members at opposite sides'o'f the slot and pin.

8. A tandem harrow comprising a front frame,

.a pair of front gangs adjustably connected therev to, arearframe, apair of rear gangs adjustably able with the transverse members atthe'various attaching portions to hold the flexible elements either nearor spaced from the 1 slot and pin whereby draft on the sliding andpivoting connection and tension in one of the flexible draft elementsresists'lateral movement of the rear draft frame duringstraight-aheadmovement of the harrow and whereby the sliding connectionpermits angular movement of the rear frame relative to the front framefor turning movement of the harrow.

5. In a tandem harrow comprising a pair of front gangs, a pair of reargangs, a front draft connected thereto, theframes including centrallongitudinal members, the one frame having an elongated slot, the otherframe having a pin fitting into the slot for a sliding and pivotingconnection of the frames, a latch member cooperating with thelongitudinal members'to prevent sliding'between the frames, transversemembers secured to and extending from opposite sides of the longitudinalmembers and having attach- I ing portions at spaced points of thetransverse members, and flexible elements extending between thetransverse members at opposite sides of the slot and pin and beingconnectable 'atthe various attaching portions to positionthe flexibleelements either near or spaced from the slot and pm. r

' JACOB V. DYRR.

